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OZ9910
Recipient #102238 printed on 1/4/2005. This is a ONE-TIME copy. Updates will not be provided.
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Change Summary
Description Change "74uA" to "80uA" in last sentence of last paragraph Modify Pin 5, 6, 7, 8, 9, 11 pin descriptions a. Change "VIN" range, b. Add "Analog Dimming" range, c. update "Thermal Impedance". a. Update general test conditions, b. Update "Normal operating frequency" test conditions, Min, Typ & Max limits, c. Update "Striking frequency" test conditions, Min, Typ & Max limits, d. Delete "Ramp peak", "Ramp Valley" & "Temp stability", e. Update "Operating frequency" test conditions, Min, Typ & Max limits, f. Update "Ramp peak" Min, Typ & Max limits, g. Update "Ramp valley" Min, Typ & Max limits, h. Delete "Analog dimming range", i. Update "ISEN reference voltage" Min & Max limits, j. Update "VSEN reference voltage" Min & Max limits, k. Update "Standby current" test conditions, Typ & Max limits, l. Update "Operation current" Max limit, m. Update "REF voltage" Min, Typ & Max limits, n. Update "HSB voltage" Min, Typ & Max limits, o. Update "NDR-PDR output" Max limits, p. Delete "Min. Overlap between diagonal switches", q. Update "Max. Overlap between diagonal switches" Min & Typ limits, r. Update "Brake before make" Min, Typ & Max limits, s. Update "Timer" Min, Typ & Max limits Update formula in No. 4. Ignition Miscellaneous corrections. Page(s) 1 3 3
CHANGES
No. 1. 2 3 Applicable Section General Description Pin Description Recommended Operating Range
4
Electrical Characteristics
4-5
5 6
Functional Information Throughout data sheet
8 ---
REVISION HISTORY
Revision No.
0.97
Description of change
1. Ordering information: Add GN, SN, IS, ISN, D & DN packages; 2. Electrical Characteristics: b. Change High Frequency Oscillator, Normal Operating Frequency Typ value fm 56 to 62; c. Change High Frequency Oscillator, Ramp Valley Typ value fm 7 to 100; d. Change Low Frequency Oscillator, `Operating Frequency' Typ value fm 200 to 187; e. Change Low Frequency Oscillator, Ramp Valley fm 84.9 to 110; f. Add `Analog Dimming Range' parameter; g. Add `ISEN Reference Voltage' & `VSEN Reference Voltage' symbols; h. Change Supply, HSB voltage Typ value fm 7 to Vin-5; i. Change Max./Min. Overlap, Max Overlap between diagonal switches Typ value fm 94.5 to 95; j. Change Threshold, Vin Under Voltage Lock Out Threshold Min. Value fm 5.8 to 5.95, Max fm 5.4 to 4.95; k. Change Timer, Over Voltage Protection Timer Typ value fm 50 to 15; 3. Others. 1. Ordering Information: Add OZ9910S 16 pin-SSOP package; 2. Recommended Operating Range: Add OZ9910S 16 pin-SSOP thermal impedance; 3. Electrical Characteristics: a) Add general test conditions before "High Frequency Oscillator" ;b) Normal operating frequency: delete test conditions; correct Typ limit to 56; c) Striking frequency: delete test conditions; correct Typ limit to 72; d) Operating frequency: delete test conditions; e) Supply current: correct test conditions; f) REF voltage: add Symbol; correct test conditions; g) Min. overlap between diagonal switches & Max. overlap between diagonal switches: correct test conditions; h) PDRV3/ NDRV2 & PDRV1/ NDRV4: correct test conditions i) Over time protection timer: correct test conditions; 4. Function Information: a) Section 4 Ignition: correct striking frequency equation denominator from Clct[pF] to Cct[pF} & Rrt to Rct ;b) Section 5 Normal Operation: correct fop equation numerator frm 18.7 to 9.35; c) Section 6 Proection: correct 2nd paragraph to read "If the lamp fails to ignite after approximately 1.5 seconds, the IC will shut down."; 5. Package Information: Add OZ9910S 16 pin-SSOP package drawings Initial release
Release Date
10/14/2004
0.96
7/26/2004
0.95
6/15/2004
12/09/04 Copyright 2004 by O2Micro
OZ9910-DS-1.0 All Rights Reserved
Page 0 CONFIDENTIAL
OZ9910
Recipient #102238 printed on 1/4/2005. This is a ONE-TIME copy. Updates will not be provided.
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Dual Forward PWM Controller
efficiency resulting in lower power dissipation and higher system reliability that are critical for radar transmitters and display systems OZ9910 supports a wide input voltage range and provides a constant, user-defined, operating frequency, ensuring that the load operates at a fixed frequency. In display systems, a single operating frequency eliminates interference among the lamps and the display panel. In radar systems, a single operating frequency avoids any influence by alias signals. The OZ9910 provides a wide-range load regulation through low-frequency LPWM and/or analog-adjust dimming controls. It also provides an option for selecting a different turn-on frequency from the operation frequency that is suitable for loads such as CCFL and TWT. The OZ9910 provides a built-in feed-forward compensation function for applications requiring a wider, dynamic input voltage range. The feed-forward compensation feature optimizes line and load regulation. To avoid over-shoot and in-rush current to both input and output loads during start up, a soft start function is provided to improve system reliability. The controller provides open-load protection, over-voltage protection and over-current protection. The striking time (turn-on) for open-load protection is user-defined. OZ9910 provides under-voltage lockout protection and will disable the IC if VIN falls below a threshold. OZ9910 resumes normal operation when VIN exceeds the threshold. To reset the IC, toggle the ENA pin. OZ9910 operates with a standby current of approximately 80uA.
FEATURES
* * * * * * * * * * * Controller for high-voltage DC/DC and DC/AC converters High-efficiency, zero voltage switching dual forward controller Feed forward compensation Combined analog and/or PWM control modes for wide-range load regulation Supports wide input voltage range Constant operating frequency Soft start function Built-in open-load protection, over-voltage protection and over-current protection Built-in under-voltage lockout function Low stand-by power Toggle ENA pin to reset IC
ORDERING INFORMATION
Part Number OZ9910G OZ9910GN OZ9910S OZ9910SN OZ9910IS OZ9910ISN OZ9910D OZ9910DN Temp Range 0oC to 70oC 0oC to 70oC 0oC to 70oC 0oC to 70oC -40oC to 85oC -40 C to 85 C 0oC to 70oC 0oC to 70oC
o o
Package 16-pin SOP 16-pin SOP, Lead-Free 16-pin SSOP 16-pin SSOP, Lead-Free 16-pin SSOP 16-pin SSOP, Lead-Free 16-PIN DIP 16-PIN DIP, Lead-Free
GENERAL DESCRIPTION
The OZ9910 is a high-efficiency pulse-width modulation (PWM) controller designed for both DC/DC and DC/AC high voltage applications. Devices such as magnetrons and traveling wave tubes (TWT) require a bias voltage up to several thousand Volts DC and Cold Cathode Fluorescent Lamp (CCFL) requires several hundred to thousand Volts AC to operate. The OZ9910, dual forward PWM controller, is optimized for such applications OZ9910 operates in a zero-voltage switch mode through the dual forward topology utilizing free-wheeling diodes. The IC operates in a constant frequency mode that minimizes electromagnetic interference (EMI). In addition, OZ9910 achieves a high power-conversion 12/09/04 Copyright 2004 by O2Micro
OZ9910-DS-1.0 All Rights Reserved
Page 1 CONFIDENTIAL
OZ9910
Recipient #102238 printed on 1/4/2005. This is a ONE-TIME copy. Updates will not be provided.
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FUNCTIONAL BLOCK DIAGRAM
VIN
VREF GNDA
Voltage Ref Current Bias
LFCLK
High-Side Driver Buffer
HSB
LCT
PDRV1
LF OSC
Output Driver
PDRV3 NDRV2 NDRV4 PGND
ADJ
ISEN
Current Feedback Control
HECLK
Control Logic
HF OSC
CT
CMP_SST
Protection
VSEN
ENA
Voltage Feedback 3.0V Control
LFCLK
Feedback Control
Figure 1. Functional Block Diagram
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OZ9910-DS-1.0
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OZ9910
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PIN DESCRIPTION
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Names NDRV4 PGND NDRV2 GNDA CT LCT ADJ ENA VSEN CMP_SST ISEN VREF VIN HSB PDRV3 PDRV1 Description Bottom MOSFET gate drive output in dual forward converter High-current power ground Bottom MOSFET gate drive output in dual forward converter Low-current signal ground High frequency oscillator capacitor for operation and striking frequency Low frequency timing capacitor for LPWM dimming and striking timer Signal input for LPWM/ analog dimming Enable and reset Transformer output over-voltage and over-current detection Soft start and loop compensation capacitor Lamp current sensing and lamp "on" detection Reference voltage output Supply voltage for IC High side driver buffer output Top MOSFET gate drive output in dual forward converter Top MOSFET gate drive output in dual forward converter
ABSOLUTE MAXIMUM RATINGS(1)
VIN GNDA, PGND Logic Inputs 32V +/-0.3V -0.3V to VREF +0.3V
Operating temp.
0oC to 70oC
Operating Junction Temp. Storage Temp.
150oC -55 C to 150oC
o
RECOMMENDED OPERATING RANGE
VIN Operating Frequency Analog Dimming Thermal Impedance (J-A) 16-pin SOP 16-pin SSOP 16-pin DIP
(1)
6V ~ 25.5V 30 KHz to 150 KHz 1.5V ~ 3.5V
o 88 C/W 93 oC/W o 58 C/W
Note : The "Absolute Maximum Ratings" are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The "Functional Specifications" table will define the conditions for actual device operation. Exposure to absolute maximum rated conditions for extended periods may affect device reliability.
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OZ9910-DS-1.0
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OZ9910
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ELECTRICAL CHARACTERISTICS
OZ9910I: -40 C < Tamb < 85 C, unless otherwise specified o o OZ9910: 0 C < Tamb < 70 C, unless otherwise specified Parameter Symbol Test Conditions CCT = 220pF , RCT = 68.1k
(2) (1) (1) (2) o o
Limits Min Typ Max
Unit
CLCT = 4700pF , RLCT = 3.3M Unless Specified High Frequency Oscillator Normal operating frequency fop Ta = 25 C Temp coefficient Striking frequency Fstrking Ta = 25 C Temp coefficient Ta = 25 C Temp coefficient Normal operation Normal operation
o o o
59.5 74.5 179.5 1.41 0 0
62.0 200 80.0 250 188.0 200 1.52 100 -
64.5 85.5 196.5 1.63 135 100
KHz ppm/ C KHz ppm/ C Hz ppm/ C V mV %
o o o
Low Frequency Oscillator Operating frequency Ramp peak Ramp valley Low Frequency PWM Duty Cycle Range Error Amplifier ISEN Reference Voltage VSEN Reference Voltage Supply Standby current Operation current REF voltage HSB voltage NDR-PDR Output NDRV2/4 sourcing resistance NDRV2/4 sinking resistance PDRV 1/3 sourcing resistance PDRV1/3 sinking resistance Rnso Rnsi Rpso Rpsi Current source Current sink Current source Current sink 17 11 12 16 22 15 15 22 IOFF ION VREF ENA = low, V = 12V ENA = high; ADJ = 2.0V; Ca=Cb=Cc=Cd=2nF
(3)
fLF
ISEN VSEN
ADJ=1.0V ADJ=1.0V
1.45 2.94
1.5 3.0
1.55 3.06
V V
4.9 6.65
80 3.89 5.0 7.0
120 5.0 5.1 7.35
A
mA V V
Vin = 12v ILOAD 10mA Vin=12v ILOAD
5mA
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OZ9910-DS-1.0
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OZ9910
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ELECTRICAL CHARACTERISTICS (Continued)
Parameter Symbol Test Conditions Limits Min Typ Max Unit
Max. / Min. Overlap Max. Overlap between diagonal switches Brake Before Make PDRV3 / NDRV2 PDRV1 / NDRV4 Threshold Vin Under Voltage Lock Out (UVLO) Threshold Enable Threshold Timer Striking Timer Over Voltage Protection Shutdown Delay 1.2 1.5 10 1.8 15 sec msec Vin rising (leaving lockout) Vin falling (entering lockout) Ena rising (enable) Ena falling (disable) 5.95 2.0 4.95 1.0 V V V V Ca=Cb=Cc=Cd=2nF Ca=Cb=Cc=Cd=2nF
(3) (3)
Ca=Cb=Cc=Cd=2nF
(3)
90
96
-
%
150 150
200 200
250 250
ns ns
Note CCT : capacitor from CT (Pin 5) to ground RCT: resistor from CT (Pin 5) to VREF Note CLCT : capacitor from LCT (Pin 6) to ground RLCT: resistor from LCT (Pin 6) to VREF Note Ca: capacitor from NDRV2 (Pin 3) to ground Cb: capacitor from NDRV4 (Pin 1) to ground Cc: capacitor from PDRV3 (Pin 15) to Vin Cd: capacitor from PDRV1 (Pin 16) to Vin
(3) (2)
(1)
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OZ9910-DS-1.0
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OZ9910
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FUNCTIONAL BLOCK DIAGRAM DESCRIPTION
Refer to the Functional Block Diagram in Figure 1, page 2, and the Pin Description Table on page 3. Voltage REF/Current Bias Block generates a bias current reference for internal use and precision 5V reference for both internal and external use. In addition, it provides a feed-forward compensated current to the Feedback Control Block. LFOSC block supplies a low frequency ramp signal to Feedback Control block. The ramp signal is compared with the external ADJ signal to yield a low-frequency, pulse-width-modulation (LPWM) signal to regulate the power delivered to the load. LFOSC also provides the striking time (turn-on) for open-load protection. The Feedback Control block consists of Current Feedback Control, Voltage Feedback Control and Control Logic. This block receives the command signal from ADJ, feedback for output voltage (VSEN) and load current (ISEN), Compensation (CMP) and LPWM. When the voltage at ADJ is greater than 1.5V, LPWM will not affect either the current feedback or voltage feedback controls. When the voltage at ADJ is less than 1.5V, the LPWM signal is activated to modulate the current feedback control loop. At this point, the analog signal applied to the error amplifier is fixed at 1.5V. The Control Logic selects either voltage feedback or current feedback as the control command to the output drives.
Depending on the system design, the Feedback Control block selects either the voltage feedback control or the current feedback control command to provide suitable load regulation. In TWT applications, the initial turn-on may rely on regulating the current. In CCFL applications, the initial turn-on is to regulate the ignition voltage. The Feedback Control block provides a high-degree of flexibility for various applications. The error amplifiers for Current Feedback Control and Voltage Feedback Control are configured as a trans-impedance amplifier to work with either voltage control or current control. HFOSC block generates a high frequency ramp signal. This signal is compared with the control command from the Feedback Control block to determine the appropriate drive outputs. Protection block protects the IC and external devices from over-voltage, open-load and overcurrent conditions. The High-side driver buffer provides a buffered voltage of Vin minus 5V to the high-side switches in the dual forward converter.
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OZ9910-DS-1.0
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OZ9910
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FUNCTIONAL INFORMATION
1. Steady-State Operation
Referring to the schematics shown in Figures 2 and 3 on pages 10 and 11 the OZ9910 drives a zero-voltage switching (ZVS), dual forward power stage where the transformer couples the energy from the power source to the secondary load. In both applications, the voltage and the current can be used as the feedback control signals to regulate the outputs. In CCFL applications, Figure 2, page 10 the current flowing through the CCFL is sensed and regulated, through sense resistor R8, then compared with a reference voltage via a current amplifier, resulting in PWM drive outputs to the dual forward converter switches. Switches M1, M2, M3, M4 are configured such that the switch in each pair, M1/M4 and M2/M3, are turned-on complementarily. The amount of time where switches M1/M2 and M3/M4 conduct, determine the amount of energy delivered to the load. A voltage loop is established to monitor the output voltage such that a required turn-on voltage is achieved. A soft-start circuit ensures a gradual increase in the output power to minimize stress to the other components. The capacitor at CMP_SST (pin 10), determines the rate of rise of the voltage on CMP_SST pin, where the voltage at this pin determines the on-time duration of switches M1/M2 and M3/M4. Circuit operation is initiated by applying the bias voltage to VIN (pin13) and subsequently providing the enable signal to ENA (pin 8) of the IC. The output drives, include NDRV4, NDRV2, PDRV3 and PDRV1 (pins 1,3,15,16 respectively) output square pulses. The frequency is determined by resistor R4 and capacitor C2 connected to CT (pin 5). Initially, the energy converted from the power source to the load is low due to the soft-start function. The energy increases as the soft-start capacitor voltage increases linearly with time. The voltage at the secondary side of the transformer T1 increases correspondingly. This process continues until the load current is detected and reaches a regulated value. The output of the error amplifier, CMP_SST (pin 10), compared with CT signal at pin 5, whose valley and peak voltages are 0.1V and 2.0V respectively, commands proper switching among the four output drives to maintain current regulation. The operations of the four switches are implemented with zero-voltage switching to provide a high-efficiency power conversion. In the TWT application, Figure 3, page 11 either the current or the voltage can be used as a feedback control
parameter. The operation theory is similar to the above discussion. Referring to Figure 2, page 10 in the case of an open-lamp condition emulating an aged lamp, the OZ9910 provides an optional, user-defined, turn-on frequency. The turn-on frequency is implemented through capacitor C2 connected to CT pin. The striking (turn-on) time is determined by capacitor C9 connected to LCT (pin 6). The ignition voltage (open-lamp voltage) is regulated through the voltage feedback loop. This highly integrated circuit (IC) provides a cost effective yet high-degree of design flexibility. An open-load protection feature is provided for safe operation when removing a lamp during normal operation under either one of the two following conditions. For condition one, when the IC senses the missing current signal through ISEN (pin 11) and the voltage at CMP_SST (pin 10) reaches an ~2.5V threshold, the output drives are shut off. Under condition two, when the voltage at VSEN (pin 9) reaches an ~ 3.0V threshold, the output drives are shut off. The output drives will remain in the latched mode. Toggling ENA (pin 8) is necessary to resume normal operation. Dimming control of OZ9910 is implemented by combining LPWM and analog-adjust for regulating the current in the CCFL. This provides a very wide range of dimming control to a CCFL. When ADJ (pin 7) input voltage is less than 1.5V, the LPWM control is activated while the amplitude of the lamp current is maintained. This mode provides a wide dimming control while maintaining the operational life-time of a CCFL. The LPWM frequency is determined by capacitor C9 and resistor R1 connected to LCT (pin 6). When ADJ (pin 7) input voltage is greater than 1.5V, the CCFL current amplitude will be increased. OZ9910 operates in a constant frequency mode. This eliminates any undesired interference between inverter and LCD panels where interference is usually associated with variable-frequency designs.
2. Enable
OZ9910 is enabled when the voltage on ENA (pin 8) is greater than 2V. A voltage of less than 1V disables the IC. When the IC is disabled, it draws approximately 80uA. An under-voltage lockout protection feature is provided that will disable the IC if VIN voltage drops below a threshold of approximately 5.6V. The IC will resume normal operation once VIN reaches a threshold voltage of greater than approximately 5.8V.
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OZ9910
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3. Soft Start
To avoid component stresses and in-rush current to the load during turn-on, a soft-function is implemented to provide reliable load operation. The soft-start function is initiated when the voltage at ENA (pin 8) is greater than 2V. The soft-start time is determined by capacitor C22 connected to CMP_SST (pin 10). The Feedback Control circuitry provides a current to charge capacitor C22.
Open-load protection: If the lamp is removed during normal operation, the voltage of CMP_SST will increase rapidly. Once the voltage at CMP_SST (pin 10) reaches a threshold of approximately 2.5V, the IC will shut down. Over-voltage protection: During normal operation, if the voltage at VSEN (pin 9) reaches a threshold of approximately 3.0V, the output of the error amplifier will maintain a constant voltage level. Meanwhile, an internal clock triggers a timer. When the timer expires (approximately 10ms), the IC shuts down.
4. Ignition
During striking (turn-on), OZ9910 generates a higher frequency for CCFL ignition. This frequency is approximately 30% higher than the normal operating frequency. The ignition (turn-on) time is determined by capacitor C9 connected to LCT (pin 6) and is approximated by the following equation: T[second] = CLCT[nF]*0.33 The striking frequency is approximated by the following equation: 3770/ RCT [k] + 15 fstriking[kHz] = 4*CCT[pF] x 1000
7. Error Amplifier
OZ9910 implements two error amplifiers, one for current feedback and the other for voltage feedback. For a CCFL working in the ignition period, the voltage feedback loop controls the ignition voltage. The non-inverting input is fixed at 3V. Once the lamp is ignited, the current feedback loop controls the amount of power delivered to the lamp. The non-inverting input is either ADJ when ADJ pin is greater than 1.5V or fixed at 1.5V when ADJ pin is less than 1.5V.
5. Normal Operation
Once the IC is enabled, the voltage at CMP_SST (pin 10) controls the rate of power delivered to the load. The voltage increases to a level such that the CCFLs are ignited. The voltage feedback loop takes control to regulate lamp voltage during the striking period. Once the current is sense at a threshold of ~0.6V, when ADJ1.5V or 0.4*DIM, when ADJ>1.5V, the IC will switch to normal operating frequency. The operating frequency is determined by resistor R4 and capacitor C2 connected to CT (pin 5). The operating frequency is approximated by the following equation: 9.35x105 fop[kHz] = CCT[pF]xRCT[k]
8. Combined Analog and Digital Dimming Control
A built-in function combines the low-frequency PWM (LPWM) and analog adjustment dimming functions to perform wide dimming control for the CCFL. The LPWM frequency is determined by capacitor C9 and resistor R1 connected to LCT (pin 6). The frequency is approximated by the following equation: 2.9x106 fLF[Hz] = CLCT [pF] xRLCT [Meg] When the ADJ pin input voltage is less than 1.5V, the ADJ pin is compared with the triangle LCT waveform and yields a proper low frequency pulse width to modulate the CCFL brightness. The peak and valley of the LCT signal are 1.5V and 0V respectively. When the ADJ pin input voltage is increased above 1.5V, the low frequency pulse width achieves 100% duty cycle and ADJ pin input voltage serves as the command signal to regulate the CCFL current.
6. Protection
The IC provides time-out protection, open-load protection and over-voltage protection features. Time-out protection for striking (turn-on): An internal counter is started when the IC is enabled. If the lamp fails to ignite after approximately 1.5 seconds, the IC will shut down
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OZ9910
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9. Feed-forward Compensation
Input voltage to the IC is intelligently processed to yield a constant/symmetrical waveform at CMP_SST (pin 10) to achieve a feed-forwardcompensation function during dimming control.
10. Output Drives
The four output drives are designed to turn-on and turn-off four switches M1, M2, M3 and M4 with intelligent phase-shift control technique. The design allows the free-wheeling diode to reset transformer in each half cycle. The body diodes associated with four switches can be served as the free-wheeling diodes. For example, the diode D3 and diode D4 are used as free-wheeling diodes for M1 and M2 switches during the first half cycle. The diodes D1 and D2 are used as the free-wheeling diodes for M3 and M4 switches during the next half cycle. The switches in the bridge are configured such that M1/M4 and M2/M3 are turned-on complementarily. This brake before make (BBM) is implemented to prevent the power source shorted to the ground. Adjusting the overlapped conduction between switches M1/M2 and M3/M4 senses the current flowing in the CCFL, thus the power delivered to the CCFL is regulated. The waveforms associated with a typical two-transistor forward converter are shown in Figure 4, page 12.
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REFERENCE APPLICATION CIRCUIT
Figure 2. Application Circuit for CCFL
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OZ9910
REFERENCE APPLICATION CIRCUIT
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Figure 3. Application Circuit for TWT
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OZ9910
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T
SWITCHES M1/M2
M1/M2 On
M1/M2 On
M1/M2 On
T1=1/2T
VDRAIN_M2
Vin
T1
SWITCHES M3/M4
M3/M4 On
M3/M4 On
M3/M4 On
VDRAIN_M4
Vin
Figure 4. OZ9910 Waveforms: 50% Duty Cycle of a 2 Transistor Forward Converter
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OZ9910
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PACKAGE INFORMATION - 16-PIN SOP 150mil: OZ9910G
EH
C L
D A B e A1
DIM A A1 B C D E e H L
INCHES MIN MAX 0.0532 0.0688 0.0040 0.0098 0.013 0.020 0.0075 0.0098 0.3859 0.3937 0.1497 0.1574 0.050 BCS. 0.2284 0.2440 0.016 0.050 0 8
MILLIMETERS MIN MAX 1.35 1.75 0.10 0.25 0.33 0.51 0.19 0.25 9.80 10.00 3.80 4.00 1.27 BCS. 5.80 6.20 0.40 1.27 0 8
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OZ9910
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PACKAGE INFORMATION - 16-PIN SSOP 150mil: OZ9910S
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OZ9910
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PACKAGE INFORMATION - 16-PIN DIP 300mil: OZ9910D
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OZ9910
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IMPORTANT NOTICE
No portion of O2Micro specifications/datasheets or any of its subparts may be reproduced in any form, or by any means, without prior written permission from O2Micro. O2Micro and its subsidiaries reserve the right to make changes to their datasheets and/or products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, patent infringement, and limitation of liability.
O2Micro warrants performance of its products to the specifications applicable at the time of sale in accordance with O2Micro's standard warranty. Testing and other quality control techniques are utilized to the extent O2Micro deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. Customer acknowledges that O2Micro products are not designed, manufactured or intended for incorporation into any systems or products intended for use in connection with life support or other hazardous activities or environments in which the failure of the O2Micro products could lead to death, bodily injury, or property or environmental damage ("High Risk Activities"). O2Micro hereby disclaims all warranties, and O2Micro will have no liability to Customer or any third party, relating to the use of O2Micro products in connection with any High Risk Activities. Any support, assistance, recommendation or information (collectively, "Support") that O2Micro may provide to you (including, without limitation, regarding the design, development or debugging of your circuit board or other application) is provided "AS IS." O2Micro does not make, and hereby disclaims, any warranties regarding any such Support, including, without limitation, any warranties of merchantability or fitness for a particular purpose, and any warranty that such Support will be accurate or error free or that your circuit board or other application will be operational or functional. O2Micro will have no liability to you under any legal theory in connection with your use of or reliance on such Support. COPYRIGHT (c) 2004, O2Micro International Limited
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